Redson has developed the online rotary shearing system to directly blank circles continuously from a coil, thus eliminating the requirement of guillotine shears, mechanical hydraulic presses, blanking tooling, etc. The system consists of the following: hydraulic decoiler, hydraulic straightener, online rotary shears, idler conveyors and power conveyor, and hydraulic cut off shear. The principle of shearing circles is by online rotary shearing method - that is, while the sheet is held rigidly, a pair of cutters rotates around the cutting tool and produces a perfect circle. Online rotary shearing can be done in a single row, double row or in triple row where 2 or 3 online rotary shears are placed diagonally opposite to perform jig-jag blanking. Hydraulic decoiler and hydraulic straightener are provided to decoil and straighten the decoiled sheet. After circle blanking by the online rotary shear, hydraulic cut off shear cuts off the scrap. Advantages: blanking of circles out of mild steel, stainless steel, aluminum and other non-ferrous materials directly from coils, eliminating the need for guillotine shear, presses and blanking tooling; blanking of large dia circles up to 1500 mm; blanking of circles in 2/3 rows in jig-jag position, thereby effecting a saving of 7-10 percent on material; substantial reduction in manpower; simplicity in operation and maintenance; low power consumption; cost saving of 7-10 percent on material and other by saving on labour, power, material handling, material price, etc; and high productivity up to 9 circles per minute. Models: single row, double row and triple row.
